30 Nov
2021
30 Nov
'21
9:30 p.m.
Can someone please explain why it's called "random" logic? Discrete
logic I understand (more or less), but I've not heard the term "random"
used in this context before now.
Thanks,
Arnold
"Ron Natalie" <ron(a)ronnatalie.com> wrote:
Indeed, the early PDPs (10/15/20) had no
microprogramming at all. Even
the early microprogrammed ones used "random logic" to implement that.
It would take ten years before large scale integration took over. The
PDP-11/44 in 1979 was the last of the discrete logic CPUs.
------ Original Message ------
From: pbirkel(a)gmail.com
To: "'TUHS main list'" <tuhs(a)minnie.tuhs.org>
Cc: "'Eugene Miya'" <eugene(a)soe.ucsc.edu>
Sent: 11/30/2021 3:07:15 AM
Subject: [TUHS] Encoding an ISA: Random Logic vs. Control Stores
I believe that the PDP-11 ISA was defined at a
time when DEC was still using
random logic rather than a control stor